Staying: Lyle - He's going through college [Major in Business Economics, minor in Math] and he's getting his teacher's certificate to teach math to the high schoolers at TJS. He and Nico are married and living on campus and selling weed (which will be legal by then, those details and other to come!)
Garret - He, Rorie and Mal split in late 2010 (his fault entirely, surprise surprise) but instead of leaving he stays at the school and moves on as the head of Public Relations, and kicks a whole lot of ass doing it.
Nicanor - After losing a limb in 2011 (it was reattached, thank you healers) he's decided that the life of a revolutionary is dangerous and will get him killed and that there has to be a better way to go about it. So he got his citizenship, and then he got his teaching certificate and he's gonna teach Spanish all up in TJS. [Spanish will be a required course, since 52% of the population in America speaks it now, nevermind in 10 years.]